21112022201221 has 16 divisors (see below), whose sum is σ = 24353815881600. Its totient is φ = 17926680245760.

The previous prime is 21112022201177. The next prime is 21112022201251. The reversal of 21112022201221 is 12210222021112.

It is a cyclic number.

It is not a de Polignac number, because 21112022201221 - 2³⁵ = 21077662462853 is a prime.

It is a super-3 number, since 3×21112022201221³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112022201251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104700105 + ... + 104901553.

It is an arithmetic number, because the mean of its divisors is an integer number (1522113492600).

Almost surely, 2^{21112022201221} is an apocalyptic number.

It is an amenable number.

21112022201221 is a deficient number, since it is larger than the sum of its proper divisors (3241793680379).

21112022201221 is a wasteful number, since it uses less digits than its factorization.

21112022201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341484.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21112022201221 its reverse (12210222021112), we get a palindrome (33322244222333).

The spelling of 21112022201221 in words is "twenty-one trillion, one hundred twelve billion, twenty-two million, two hundred one thousand, two hundred twenty-one".